Elevator.



110.853,.534. 4 'PATENTBD MAY 14, 1907.

M. DASHIBLL.

ELEVATOR. 'urmm'rronrnpnjnno.1a. 1905;

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PATENTED MAY 14, 19-07.

M. DASHIBLLL v ELEVATOR.

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UNITED STATES PATENT OFFICE.

MILTON DASHIELL, OF BALTIMORE, MARYLAND, ASSIGNOR OF TWO-THIRDS TO JOHN W. WOODLAND, OF BALTIMORE, MARYLAND.

ELEVATOR.

Specification of Letters Patent.

Patented May 14, 1907.

Application filed December 18, 1905- Serial No. 292,320.

To ctZZ whom it may concern:

Be it known that I. MILTON DASHIELL, a citizen of the United States, residing at Bal timore, State of Maryland, have invented certain new and useful Improvements in Elevators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to.

reference indicate similar parts in the several views, Figure 1 is an elevational view of a shaft door, part of the floor upon which the door opens being'broken away to illustrate the casing of the stop mechanism; Fig. 2 is a top plan view of the stop mechanism, and showing a section of the shaft on line 22 of Fi 1, the car being shown in top plan as be ow the level of the floor. Fig. 3 is a vertical section taken on line 33 of Fig. 1, the sliding door being opened and the car being in position at the landing. horizontal section of the grooved disk carried by the controller. Fig. 5 is a detail perspective view partly in section, showing a modified structure in which the stop mechanism is adapted for use in connection with a cable operated elevator. Fig. 6 is a detail top pl an view ofa modified form of stop mechanism.

Referring now to the drawings, there is shown an elevator shaft 5 opening at its forward side upon a landing 6, half of the opening being closed by a stationary grating 7, while a sliding door 8 is arranged to lie at times in position to close the other half of the opening and at times to lie in inoperative position and against the outer face of the grating 7. This door 8 lies, when in closed position, with its lower corner 9 adjacent to the lower inner corner of the grating 7 and the lower portion of the forward face of the Fig. 4 is a detail door 8 is cut away adjacent to its corner 9 to form a cam surface 10 slanting from this corner outwardly toward the outer edge of the door for a purpose to be presently described. A roller 11 is journaled horizontally in the lower portion of the grating 7 and receives the door 8 thereagainst to reduce the friction between the door and grating.

Located beneath the landing 6, there is a casing 7 in which there is pivoted for horizontal movement, a horizontally disposed angle lever 12 having one end turned. upwardly, as shown at 13, to extend through the landing 6 and thereabove and a horizontally journaled roller 14 is carried by this upwardly turned portion of the angle lever and rests against the outer face of the door 8 at the lower portion thereof. The angle lever includes two arms 12 and 12, the former being that which has the upwardly turned end portion 13, and the arm 12 extends in a direction generally parallel with the grating 7 and has the pivot point ofthe lever located therein to a point spaced from its union with the arm 12. The arrangement is thus such that when the door 8 is moved into open position, the roller 14 lying in engagernent with the cam surface 10 of this door, will be moved with the arm 12 of the angleleyer forwardly away from the shaft 5, which'rwill move the free end of the arm 12- toward the shaft, as will be readily understood.

A plunger 15 is located within thecasing 7 and extendstoward the shaft, this plunger having a finger l6 and being movable slidably to bring the free end of the finger into and out of the shaft, and this plunger is located in position to receive the free end of the arm 12" against its inner end. The plunger is slidably engaged in a guide 18, while the finger 16 is similarly engaged in a guide 19 and engaged with this finger between the guide 19 and the plunger, there is a helical spring 17 which thus holds the plunger yieldably at the forward limit of its movement and with the finger out of the shaft, the spring also holding the angle lever with the roller 14 tight against the cam surface of the door 8. I

A car A is located in the shaft 5 and has a controller 20 which includes a revoluble vertical rod 21 provided with an operating handle 22 at its upper end and extending at its lower end through the floor of the car and having mounted thereupon beneath the floor a horizontal disk 23 having a vertical groove 24 in its periphery. This groove is so located that when the controller is in position to hold the car against movement, the groove lies in position to receive therewithin the finger 16 of the plunger. It will thus be seen that when the car is brought into position at the landing 6, and is stopped, opening of the door 8 will move the finger 16 into the groove 24, and the finger will then extend beneath the floor of the car and through an opening 25 formed in a face plate 26 which extends above and below the floor of the car and which also acts as a support for the controller 21. If it be now desired to raise or lower the car, the door 8 must first be closed to bring the fingers 16 out of the groove 24, so that the controller 20 can be moved.

The grating 7 has an opening 27 therein and pivoted 1n brackets 29 carried, by the landing 6 within the shaft 5, there is a vertically extending latch 30 having a nose 31 movable into and out of position to extend through the recess 27 and into the path of movement of the door when the latter is opened when the latch is moved upon its pivot. The nose is located above the pivot oint of the latch, and the latter extends beow its pivot point and has a roller 32 journaled therein at its lower end, the roller extending vertically and into the shaft beyond the latch, the inwardly extending portion of the roller lying in the path of movement of a cam block 33 carried by the car. A spring 34 is disposed to hold the latch yieldably with its nose 31 in the opening 27. The cam block 33 is so dis osed that it lies in engagement with the rol er 32 to hold the latch 30 in inoperative position when the car is at the landing 6 and it will thus be apparent that the door 8 may be opened only when the car is in such position.

In the modified form of the invention shown in Fig. 5, the stop mechanism is adapted for use in connection with a cable operated elevator. In this form of the invention, a stem G'COIIQSPOIldS to the finger 16 and has a yoke b at its end which is movable into the shaft and when this yoke is in the shaft, it lies with its spaced legs 0 at opposite sides of the o erating cable (1 and between a pair of mem ers e secured to the cable. Movement of the cable when the yoke in is its just described osition, is prevented by engagement of t e members 6 with the yoke and the car cannot be started until the door is closed, as will be readily understood, the stem a and yoke I) being controlled by the door as in the first described form.

In Fig. 6 there is shown a modified form of the invention in which a lever Z is pivoted between its ends and rests at one end against the plunger 15. The other end of the lever receiving thereagainst one end of a slide Y, mounted in guides in the casing 7 and having its other end, which lies toward the door 8, turned upwardly as shown at X and having journaled therein a roller W corresponding in arrangement and function to the roller 14.

What is claimed is: The combination in an elevator including a shaft and a car movable in the shaft, of a door for theshaft movable into and out of o erative position, a movable controller in t e car, a disk carried by the controller for movement therewith and having a notch therein, a finger mounted independently of the car for movement into and out of position tov en age in the notch, a plunger connected wit the finger for movement therewith, a spring arranged to hold the finger yieldably out of position for engagement with the notch, a pivoted lever engaging the plunger and movable to move the plunger against the action of the spring, means for moving the lever, said means including a roller disposed for engagement .by the door when the latter is moved into open position, to bring the finger into notch-enga ing position, 'a latch plvoted independent y of the car anrl having a nose movable into and out of positidn to hold the door in closed position, and a spring arranged to hold the latch yield ably wlth its nose in operative position, said latch bein arranged for engagement by the car, to hoId the latch against the action of the spring when the car is in position to receive the finger in the notch of its disk.

In testimony whereof, I aflix my signature, in presence of two witnesses.

MILTON DASI-IIELL.

Witnesses:

A. D. PATRICK, WARREN V. LUDLAM. 

